MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, offering environmental sealing and a wide operating temperature range of -65 °C to 200 °C. These harsh environment connectors come in various configurations including front wall mount, rear wall mount, jam nut, rear box mount, and front box mount receptacles. Available in aluminum shells with plating options such as cadmium and nickel, they ensure reliable performance in demanding conditions. With 52 insert arrangements and M39029 rear release crimp contacts, they provide versatility for different applications. Designed for military specifications, these connectors are ideal for rugged environments requiring secure and durable electrical connections.